Castor



FIG. 1 is a top, front and side perspective view of a castor showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view thereof from the left of FIG. 2, the side elevational view thereof from the right of FIG. 2 being the mirror image thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a top, front and side perspective view of a second embodiment;

FIG. 7 is a front elevational view thereof;

FIG. 8 is a side elevational view thereof from the left of FIG. 7; the side elevational view from the right of FIG. 7 being a mirror image thereof;

FIG. 9 is a rear elevational view thereof; and,

FIG. 10 is a top plan view thereof.

The bottom plan view forms no part of the claimed invention and so is not shown. 

The ornamental design for a castor, as shown and described. 